Coil-retaining device and method of assembling the same.



J. P. NIKONOW.

COIL RETAINING DEVICE AND METHOD OF ASSEMBLING THE SAME.

APPLICATION FILED DEC.26.1913.

1,300,859. Patent-ed Apr. 15,1919.

WITNESSES: mv TOR A BY ATTORNEY UNITED STATE PATENT OFFICE.

JOHN P. NIKONOW, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOB TO WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

Specification of Letters Patent.

Patented Apr. 15, 1919.

Application filed December 26. 1913. Serial No. 808,710.

To all whom it'may concern:

Be it known that I, JOHN P. NIKONQW, a citizen of the United States, and a resident of \Vilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Coil-Retaining Devices and Methods of Assembling the Same, of which the following is a specific-al ion.

My invention relates to dynamo-electric machines, and it has special reference to supporting structures for the field coils thereof.

One object of my invention is to provide an efi'ective, durable, inexpensive and conveniently applied coil support that is capable of resisting the stresses imposed upon the field coils and of holding the said coils securely in position under all operating conditions.

A further object of my invention is to provide a novel method of assembling the coil support upon a polar projection.

Field coil supports, as heretofore constructed, have usually been of a cumbersome and expensive design, or have been composed of a multiplicity of parts which were liable to work loose under continued stresses, thereby allowing the coils 'to become displaced.

According to my present invention, I provide a supporting means for field coils that is extremely simple in construction, and embodies a minimum number of parts, that are capable of being readily assembled.

My invention is illustrated in the accompanying drawings, in which Figure 1 is an end and sectional view of a motor constructed in accordance with my invention, and Fig. 2 is a side and sectional view of the motor shown in Fi 1.

Referring to the drawings, a motor 1 comrises a stationary field magnet frame 2, having polar projections 3. that are surrounded by field coils 4, and an armature 5. The polar projections 21 are provided with oppositely disposed rectangular recesses 10 that extend acrossthe sides of the poles and are adapted to receive the ends of, or shoulders 11 upon, coil supports 12. The coil supports 12 are constructed of pliable material such as copper, and, before assembling, are substantially flat rectangular shoulders 11 in position in the recesses l0.

The projecting ends of the supports 12 are 'then'bent outwardly at right angles to the main portions thereof to form supporting arms 13. The supports 12 and the coils 4 are interlocked in position by reason of their relations to the polar projections 33, thereby providing a rigid and substantial structure.

Leaf springs 14 may also be provided to assist in supporting the coils 4, if desired, but these are not essential and form no part of my present invention.

While I have shown and described the preferred embodiment of my invention and a particular adaptation thereof, I do not wish to be limited to the precise construction shown.

I claim as my invention:

1. The method of asembling a coil-support upon a polar projection which consists in first loosely interlocking said support with said projection, then placing a field-magnet coil over said projection and said support to maintain said support in looking engagement with said projection and finally in bending a portion of said support over said fieldcoil to hold said coil in position. A

I 2. The method of assembling-a coil-support and a polarprojection provided with corresponding recessed and projectin portions which consists in engaging sai portions, then placing a field-magnet coil over said projection and said support and finally in bending a portion of said support over said coil.

3. The method of assembling a coil-sup port upon a polar projection provided with a recess whichconsists in inserting a portion of a flexible strip into said recess, then placing a field-magnet coil over said projection and said strip and finally in bending a por-' tion of said strip over the edge of said coil. 4. The combination of a polar projection provided with a recess on one side, a coil- -In testimony whereof, I have hereunto supporting strip having an ofi'set portion subscribed my name this 19th day of Dec. 1-0 intergmking githlsaid recess, and aftilillplosi- 1913. v tione on sai p0 ar projectionan 0 ing 5 said strip in position, said strip having a. p JOHN NIKONOW' bendable end adapted to engage said coil to Witnesses:

support it in 'POSltiOll on the polar projec-- HARRY T. GEORGE, tion. B; B. HINES. 

